southernism

It is one of the national peccadilloes that anyone who lives north of St. Albans has some kind of prejudice against Londoners — perhaps "prejudice" is the wrong word — or rather not against Londoners but against southernism.

Many are known southernisms in the sense that they are also cited in sources such as Dictionary of American Regional English (henceforth, DARE) or Carver (1987).